Fill in the powers of a, b, and c to make the equation true: $\displaystyle{{\left({{a}}^{{2}}{{b}}^{{-{{4}}}}{{c}}^{{-{{3}}}}\right)}}^{{-{{5}}}}\cdot{{\left({{a}}^{{-{{3}}}}{{b}}^{{-{{6}}}}{{c}}^{{2}}\right)}}^{{4}}={{a}}^{?}{{b}}^{?}{{c}}^{?}\usepackage{cmbright}\Huge\$

Exponents may be positive, negative, or 0.